How difficult would it be to convert a PKM machine gun from 7.62x54R to 7. 62 NATO (or .308)? Would the quick-change barrel system help enough? - Quora
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Chamber adapters for gallery shooting - General Ammunition Discussion - International Ammunition Association Web Forum
![Chamber adapters for gallery shooting - General Ammunition Discussion - International Ammunition Association Web Forum Chamber adapters for gallery shooting - General Ammunition Discussion - International Ammunition Association Web Forum](https://global.discourse-cdn.com/business6/uploads/cartridgecollectors/optimized/3X/d/d/dd51cfa5650bf1c4be28434d4e89c185ef39a7a0_2_843x1024.jpeg)